Beef Stroganoff over Rice

3 cups beef stock 1 carrot , chopped 6 sprigs fresh thyme 1 bay leaf 2 pounds chuck roast , cut into 2-inch cubes Kosher salt and freshly ground black pepper[...]

1 tablespoon butter 1 1/2 cups portabella mushrooms , chopped 1 large onion , chopped 3 tablespoons white wine 1 lb ground beef 1 teaspoon salt ground pepper[...]